html,body,div { 
	margin:0px; padding:0px; 
}

.box { 
	background: white; width: 100vmin; height: 100vmin; margin: 0 auto; 
}

.col { 
  background: orange; float: left; width: 28vmin; height: 28vmin; border-radius: 12%; margin: 4vmin 0px 0px 4vmin; 
  text-align: center; line-height: 28vmin;
}